DOC7707 datasheet(22/307 Pages) ETC1

Part #	DOC7707

Description	Microcontroller with 8/16K Bytes of ISP Flash and USB Controller

PDF	307 Pages

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Manufacturer	ETC1 [List of Unclassifed Manufacturers]

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7707F–AVR–11/10

AT90USB82/162

assume that no Flash Boot Loader is present in the software. If such code is present, the

EEPROM write function must also wait for any ongoing SPM command to finish.

Note:

1. See “About Code Examples” on page 7.

Assembly Code Example

(1)

EEPROM_write:

; Wait for completion of previous write

sbic

EECR,EEPE

rjmp

EEPROM_write

; Set up address (r18:r17) in address register

out

EEARH, r18

out

EEARL, r17

; Write data (r16) to Data Register

out

EEDR,r16

; Write logical one to EEMPE

sbi

EECR,EEMPE

; Start eeprom write by setting EEPE

sbi

EECR,EEPE

ret

C Code Example

(1)

void

EEPROM_write(unsigned int uiAddress, unsigned char ucData)

{

/* Wait for completion of previous write */

while(EECR & (1<<EEPE))

;

/* Set up address and Data Registers */

EEAR = uiAddress;

EEDR = ucData;

/* Write logical one to EEMPE */

EECR |= (1<<EEMPE);

/* Start eeprom write by setting EEPE */

EECR |= (1<<EEPE);

}

DOC7707 Datasheet(PDF) 22 Page - List of Unclassifed Manufacturers

DOC7707 Datasheet(HTML) 22 Page - List of Unclassifed Manufacturers

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